I’m trying to add a custom attribute to the particles in a Niagara emitter and it doesn’t seem to be working. In the Parameters tab, I clicked the + button next to Particles and selected “Make New” > “float”; the new attribute appears there, but when I try to reference it from a custom module’s blueprint (even after compiling the emitter and the blueprint), it doesn’t show up. Moreover, when I close the emitter window and reopen it from the Content Browser, the custom attribute is gone. Am I misunderstanding how this works, or is some of this functionality just not hooked up yet? I’m using 4.20 preview 4.